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   Date: Mon, 4 Feb 91 13:37:28 -0500
   From: Andrew L. M. Shalit <alms>

      Date: Mon, 4 Feb 91 10:22:45 CST
      From: lynch@aristotle.ils.nwu.edu (Richard Lynch)

      >I imagine it would be easy to explicitly code this behavior into
      >the functions which you add to *RESTORE-LISP-FUNCTIONS*.  You would
      >also have to backpatch the function(s) which are already on
      >*RESTORE-LISP-FUNCTIONS* (by wrapping them in another function
      >which calls them conditionally).
      >   -andrew
      But what could the test be?  Any global var that is set would be STORED set
      in the image, hence re-starting the image would not work because the flag
      is stuck on...
      The only solution I can think of is to have a file with a single flag in it
      that tells whether or not we are in the process of quitting.  Seems

   The only thing that comes to mind would be a check based on time.
   You write an exit function which stores the time in a variable.
   The restore functions only execute if a certain amount of time
   has elapsed since the exit.

I just got a better idea.  You can check the result of calling
FINDER-PARAMETERS.  The startup document will be the same before and
after a call to dumplisp.  It will be different when you reboot.  The
restriction here is that you give your image a name which is different
from the image it was created from.